params.def (PARAM_MIN_SPEC_PROB): New.

2005-08-24  Pete Steinmetz  <steinmtz@us.ibm.com>

        * params.def (PARAM_MIN_SPEC_PROB): New.
        * sched-rgn.c (MIN_PROBABILITY): Delete.
        (compute_trg_info): Convert to PARAM_VALUE.
        * doc/invoke.texi (param): Document min-spec-prob.

From-SVN: r103450

gcc/ChangeLog

+2005-08-24  Pete Steinmetz  <steinmtz@us.ibm.com>
+
+	* params.def (PARAM_MIN_SPEC_PROB): New.
+	* sched-rgn.c (MIN_PROBABILITY): Delete.
+	(compute_trg_info): Convert to PARAM_VALUE.
+	* doc/invoke.texi (param): Document min-spec-prob.
+
 2005-08-24  Fariborz Jahanian <fjahanian@apple.com>
 
 	* config/darwin.h: define __PIC__

gcc/doc/invoke.texi

@@ -6005,6 +6005,10 @@ interblock scheduling.  The default value is 10.
 The maximum number of insns in a region to be considered for
 interblock scheduling.  The default value is 100.
 
+@item min-sched-prob
+The minimum probability of reaching a source block for interblock
+speculative scheduling.  The default value is 40.
+
 @item max-last-value-rtl
 
 The maximum size measured as number of RTLs that can be recorded in an expression

gcc/params.def

@@ -451,6 +451,11 @@ DEFPARAM(PARAM_MAX_SCHED_REGION_INSNS,
 	 "The maximum number of insns in a region to be considered for interblock scheduling",
 	 100, 0, 0)
 
+DEFPARAM(PARAM_MIN_SPEC_PROB,
+         "min-spec-prob",
+         "The minimum probability of reaching a source block for interblock speculative scheduling",
+         40, 0, 0)
+
 DEFPARAM(PARAM_MAX_LAST_VALUE_RTL,
 	 "max-last-value-rtl",
 	 "The maximum number of RTL nodes that can be recorded as combiner's last value",

gcc/sched-rgn.c

@@ -251,10 +251,6 @@ static void compute_dom_prob_ps (int);
 #define IS_SPECULATIVE_INSN(INSN) (IS_SPECULATIVE (BLOCK_TO_BB (BLOCK_NUM (INSN))))
 #define INSN_BB(INSN) (BLOCK_TO_BB (BLOCK_NUM (INSN)))
 
-/* Parameters affecting the decision of rank_for_schedule().
-   ??? Nope.  But MIN_PROBABILITY is used in compute_trg_info.  */
-#define MIN_PROBABILITY 40
-
 /* Speculative scheduling functions.  */
 static int check_live_1 (int, rtx);
 static void update_live_1 (int, rtx);
@@ -1013,7 +1009,7 @@ compute_trg_info (int trg)
       if (sp->is_valid)
 	{
 	  sp->src_prob = GET_SRC_PROB (i, trg);
-	  sp->is_valid = (sp->src_prob >= MIN_PROBABILITY);
+	  sp->is_valid = (sp->src_prob >= PARAM_VALUE (PARAM_MIN_SPEC_PROB));
 	}
 
       if (sp->is_valid)